home *** CD-ROM | disk | FTP | other *** search
- ## Copyright (C) 1995, 1996, 1997 Kurt Hornik
- ##
- ## This program is free software; you can redistribute it and/or modify
- ## it under the terms of the GNU General Public License as published by
- ## the Free Software Foundation; either version 2, or (at your option)
- ## any later version.
- ##
- ## This program is distributed in the hope that it will be useful, but
- ## WITHOUT ANY WARRANTY; without even the implied warranty of
- ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- ## General Public License for more details.
- ##
- ## You should have received a copy of the GNU General Public License
- ## along with this file. If not, write to the Free Software Foundation,
- ## 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-
- ## usage: values (x)
- ##
- ## Return the different values in a column vector, arranged in ascending
- ## order.
-
- ## Author: KH <Kurt.Hornik@ci.tuwien.ac.at>
- ## Description: Extract unique elements
-
- function v = values (x)
-
- if (nargin != 1)
- usage ("values (x)");
- endif
-
- if !(is_vector (x))
- error ("values: x must be a vector");
- endif
-
- i = any (isnan (x));
- x = x(find(!isnan (x))); # HACK!
- n = length (x);
- x = reshape (x, n, 1);
- s = sort (x);
- v = s([1; (find (s(2:n) > s(1:n-1)) + 1)]);
- if (i)
- v = [v; NaN];
- endif
-
- endfunction
-